| Summary: | EGL application crashes with BadDrawable at SwapBuffers | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Giovanni Campagna <scampa.giovanni> |
| Component: | EGL | Assignee: | mesa-dev |
| Status: | RESOLVED DUPLICATE | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | chadversary, jstpierre, mchqwerty, scampa.giovanni |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
Test case
Proposed fix |
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Created attachment 95275 [details] [review] Proposed fix I think we should just remove the optimization since a 0x0 size always indicate that we haven't fetched buffers yet. Is this patch submitted to mesa-dev list? (In reply to comment #2) > Is this patch submitted to mesa-dev list? Or maybe just merged? |
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Created attachment 95167 [details] Test case If you create two X windows, make one EGL context current to the first one and then to the second one, then clear and swap the second one, you will get an X error at swap buffers time. After debugging, I found that the glClear is optimized away because the gl_framebuffer has Width and Height == 0, despite the glViewport call that invalidated the drawable. Thus intel_prepare_render() is never reached (the viewport is already initialized in the second MakeCurrent call) and we never query X for the DRI2 buffers for the second window. X logs include [107772.804] (EE) intel(0): [DRI2] DRI2SwapBuffers: drawable has no back or front? Test case attached. This is 100% reproducible here. Mesa is befbda56a246f77797bdf13fc005353441db2879, from Feb 22, master branch. Driver is i965 DRI, on a GM45 card.